package com.jky.stmall.exercise;

public class C0 {
    public C0(){
        System.out.println("1");
    }
    {
        System.out.println("2");
    }
    static {
        System.out.println("3");
    }
    public void f1(){
        System.out.println("f1");
    }
    public void f2(){
        System.out.println("f2");
        f1();
        f3();
    }
    private void f3(){
        System.out.println("f3");
    }

}
class Cson extends C0{
    public void f1(){
        System.out.println("Cson.f1");
    }

    public void f3() {
        System.out.println("Cson.f3");
    }
}